\input zb-basic
\input zb-ioport
\iteman{io-port 03485781}
\itemau{Kesel'man, D.Ja.}
\itemti{On elementary theories of graphs and Abelian loops.}
\itemso{Math. Notes 16(1974), 1167-1171 (1975); translation from Mat. Zametki 16, 957-968 (1974).}
\itemcc{}
\itemut{}
\itemli{doi:10.1007/BF01098445}
\end